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A kind of solar cell based on hot carrier and preparation method thereof

A technology of solar cells and hot carriers, applied in the field of solar cells, can solve the problem that solar cells cannot directly use light to excite high-energy electrons

Inactive Publication Date: 2020-12-01
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a solar cell based on hot carriers and its preparation method, which is used to solve the problems in the prior art that solar cells cannot directly use high-energy electrons excited by light.

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  • A kind of solar cell based on hot carrier and preparation method thereof
  • A kind of solar cell based on hot carrier and preparation method thereof
  • A kind of solar cell based on hot carrier and preparation method thereof

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preparation example Construction

[0043] The preparation method of the hot carrier battery of the present invention mainly comprises the following steps:

[0044] 1) Prepare a layer of TiO on conductive glass FTO 2 as an electron transport layer.

[0045] 2) Using magnetron sputtering on TiO 2 A layer of gold is used as the second conductive electrode.

[0046] 3) Prepare a layer of perovskite on the second conductive electrode as a light-absorbing layer.

[0047] Its working mechanism is as follows: the thermal electrons generated by the light-excited light-absorbing layer pass through the second conductive electrode and inject into the conduction band of the electron transport layer, and the injected electrons are connected to the external circuit through the first conductive electrode and the second conductive electrode to form a conductive loop, thereby generating photocurrent.

Embodiment 1

[0049] Such as figure 1 The schematic diagram of the battery structure shown, each layer is 1: the first conductive electrode (FTO), 2: the electron transport layer (TiO 2 ), 3: the second conductive electrode (Au), 4: light-absorbing layer (perovskite), wherein the conductive glass FTO is a purchased commercial product, and the preparation method of other layers is as follows:

[0050] 1) TiO 2 Layer preparation: Dissolve titanium tetraisopropoxide in a mixed solution of isopropanol and hydrochloric acid according to different volume ratios (volume ratio of isopropanol to 37% hydrochloric acid solution is 200:1), to prepare two solutions, tetraisopropanol The volume ratio of titanium to the mixed solution is 7:100, which is prepared as the first solution, and the volume ratio of titanium tetraisopropoxide and the mixed solution is 9:100, which is prepared as the second solution. After the two solutions were stirred at room temperature for one hour, the first solution was sp...

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Abstract

The invention provides a solar cell based on hot carriers, comprising a first conductive electrode, on which an electron transport layer, a second conductive electrode, and a light absorption layer are sequentially arranged. Based on the basic theory of hot carriers and the working mechanism of solar cells, the invention designs and prepares a solar cell that directly uses hot electrons to work to generate photocurrent.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell based on hot carriers and a preparation method thereof. Background technique [0002] Energy is an important pillar of social progress and economic development. Since the use of traditional fossil energy has caused serious environmental pollution, the development of clean energy is an inevitable requirement for sustainable development. Solar energy is a clean and pollution-free energy source. As one of the main ways to utilize solar energy, solar cells have been vigorously developed in recent years. [0003] A solar cell is a photoelectric conversion device based on light-excited semiconductors to generate carriers, and the carriers are transported through the conduction band and valence band to form a loop through an external circuit to obtain electrical energy. When the energy of light is less than the forbidden band width of the semiconductor, it cannot be ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K30/151Y02E10/549
Inventor 宋群梁王刚廖丽萍
Owner SOUTHWEST UNIV